One day, a bomb explodes. But this is no ordinary bomb. No-one is killed, there is no smoke, no noise... instead, all light and colour disappear from Earth. a terrible darkness descends upon the people of the world, who are thus deprived of the things they need in order to live. They are helpless, faced by a situation they could never have imagined, even though they themselves have brought it about. It is impossible to have fun or to work. There is no school. No animals. No wind. There is nothing at all. The bomb has destroyed the sun, the Pole Star, all the other stars, the water, the animals and the plants. Only Javier, the magician boy who lives in the Valley of the Three Potatoes, will be able to solve this terrible problem, by painting the world with his brushes and teaching the grown-ups to be more careful.